First some excerpts from the OIE report, then I'll return with a bit more on H7N7.

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

On 27 July 2016, LPAI H7N7 was detected in mallard ducklings collected in connection with the Danish surveillance programme for avian influenza. The diagnosis was confirmed and the virus was typed by sequencing. The killing of the mallards at the infected holding will be conducted on 28 July 2016. The Danish Veterinary and Food Administration has established a restricted zone of 1 km around the holding and are implementing the necessary measures in accordance with Council Directive 2005/94/EC

Control measures

Measures applied

Movement control inside the country Zoning Vaccination prohibited No treatment of affected animalsMeasures to be applied

Disinfection / Disinfestation Stamping out

While a small number of human infections with (LPAI or HPAI) H7N7 viruses have been recorded, they have mostly been mild, often producing little more than conjunctivitis.

Outbreaks in poultry holdings caused by low
pathogenic or high pathogenic avian influenza A(H7N7) viruses have been
reported previously in Europe, as well as human infections with low
pathogenic avian influenza virus A(H7N7). Such infections generally
cause mild disease with influenza-like symptoms or conjunctivitis.The
group at risk for infection includes people with occupational exposure
to poultry. This group should be made aware of the clinical features of
infection, and advised to alert authorities and healthcare providers
about any relevant exposure if they develop influenza-like illness or
other symptoms.There is
a low risk of zoonotic transmission to people who are directly exposed
to infected birds during the culling and destruction process when there
are outbreaks in poultry farms. The risk can be minimised if the
exercise is performed under the safety measures recommended in Directive
2005/94/EC. Persons with direct contact to infected poultry before or
during culling and disposal should be monitored for symptoms, and
postexposure antiviral prophylaxis should be considered.The risk for zoonotic transmission to the general public in EU/EEA countries is considered to be extremely low.

The caveat being (as always) that influenza viruses are constantly changing and evolving, and what we believe to be true about a particular subtype or strain can change over time.